What was your reason to change from a kickr to rollers? I hope this wasn’t a replacement as they are extremely different devices. a Kickr, or any smart trainer, will provide you multiple resistance options. Rollers are general to work balance, smoothness and pedal technique with zero resistance. While you can find rollers with magnetic resistance and or types of fans…they are nothing like a smart trainer.
A Kickr and rollers are best together, not a replacement. The majority of your workouts on the Kickr and some of the lower power level workouts on the rollers. Baxter, Petit, bald Knob, Taku…all favorites for me on rollers).
I love my rollers, dearly…but they are not a resistance trainer.